<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			@keyframes dh{
				0%{transform: rotate(0deg);}
				100%{transform: rotate(200deg);left: 100%;}
			}
			.box{
				/*渐变*/
				background:linear-gradient(to bottom,#fafafa,#ccc);
				border-radius: 50%;
			}
			.box:nth-child(1){
				width: 300px;
				height: 300px;
				animation: dh 3                                                                                                0s;
			}
			.box:nth-child(2){
				width: 100px;
				height: 100px;
			}
			.box:nth-child(3){
				width: 200px;
				height: 200px;
			}
		</style>
	</head>
	<body>
		<div class="box"></div>
		<div class="box"></div>
		<div class="box"></div>
	</body>
</html>
